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DRV201A

更新时间： 2024-11-02 12:28:11
品牌 Logo 应用领域
德州仪器 - TI 驱动器电机摄像机
页数 文件大小 规格书
25页 881K
描述
VOICE COIL MOTOR DRIVER FOR CAMERA AUTO FOCUS

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DRV201A 数据手册

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DRV201A  
www.ti.com  
SLVSBN6 –JUNE 2013  
VOICE COIL MOTOR DRIVER FOR CAMERA AUTO FOCUS  
Check for Samples: DRV201A  
1
FEATURES  
•
Configurable for Linear or PWM Mode VCM  
Current Generation  
•
Improved PWM-to-Linear Mode Settling Time  
vs. DRV201  
•
•
•
High Efficiency PWM Current Control for VCM  
Advanced Ringing Compensation  
•
•
•
•
•
Improved EMC Performance vs. DRV201  
Operating Temperature Range: -40ºC to 85ºC  
6-Ball WCSP Package With 0.4-mm Pitch  
Max Die Size: 0.806 mm x 1.49 mm  
Max Package Height: 0.3 mm  
Integrated 10-bit D/A Converter for VCM  
Current Control  
•
•
Protection  
–
–
–
–
–
Open and Short-Circuit Detection  
Undervoltage Lockout (UVLO)  
Thermal Shutdown  
APPLICATIONS  
•
•
•
•
•
•
Cell Phone Auto Focus  
Digital Still Camera Auto Focus  
Iris and Exposure Control  
Security Cameras  
Internal Current Limit for VCM Driver  
4-kV ESD-HBM  
I2C Interface  
Web and PC Cameras  
Actuator Controls  
DESCRIPTION  
The DRV201A is an advanced voice coil motor driver for camera auto focus. It has an integrated D/A converter  
for setting the VCM current. VCM current is controlled with a fixed frequency PWM controller or a linear mode  
driver. Current generation can be selected via I2C register. The DRV201A has an integrated sense resistor for  
current regulation and the current can be controlled through I2C.  
When changing the current in the VCM, the lens ringing is compensated with an advanced ringing compensation  
function. Ringing compensation reduces the needed time for auto focus significantly. The device also has VCM  
short and open protection functions.  
FUNCTIONAL BLOCK DIAGRAM  
Cin  
VBAT  
OSCILLATOR  
REFERENCE  
10-bit  
DAC  
POR  
ISOURCE  
DIGITAL  
VCM  
REGISTERS  
I2C  
RINGING  
ISINK  
COMPENSATION  
SCL  
SDA  
R
sense  
GND  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2013, Texas Instruments Incorporated  
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